Your dog, with his or her keen sense of smell, is able to detect menstruation and other changes by both odor and hormonal levels.
While the invasive sniffing can be embarrassing, especially if your dog does it to a visitor, it's their way of saying hello and learning about someone. A dog's nose is a powerful tool. Dogs have up to 300 million scent sensors in their noses, compared to humans who only have 6 million.
Your dog, with their super-sensing nose, can certainly smell the pheromones your body is giving off, and often, they're game to investigate. This means they can stick their noses in places they certainly don't belong.
The chemical aromas communicate what a dog likes to eat, and identify gender and mood. By simply smelling, a dog can determine if a new friend is male or female, happy or aggressive, healthy or ill.
To get to the heart of your question, male dogs have excellent senses of smell and can sense an intact female in heat up to 3 miles away. Dogs have geographic territories, and they can generally detect any intact females within those boundaries.
Whether or not dogs are more attracted to one gender can't be objectively answered because all dogs and people are different. But, dogs generally tend to be more attracted to a specific set of behaviors that are exhibited mostly by adult women. It's not that dogs are exclusively attracted to female adults.
While male dogs do not go into heat, they do react to females on heat. Male dogs can detect the female's pheromones emitted during oestrus from great distances as early as six (6) months of age.
Dogs rely heavily on their noses and have a much more sensitive sense of smell than humans, so they're naturally more attracted to sweaty parts of the body, like the groin area. A dog will sniff your crotch simply because they are curious about you and want to learn more about your age, sex, and mood.
If an intact male dog catches the scent of a nearby female in heat, she will become his entire focus. Male dogs may stop eating, increase their marking, become increasingly aggressive and obsess over tracking down the female dog in heat throughout the duration of her cycle.
Not only do dogs recognize and remember their humans' scents, but they also get more excited about a whiff of "their" humans than about anything else.
When dogs sniff people they are gaining all sorts of information about us. They know if we are familiar or a stranger. They know which scents we have attracted while we've been away. They know if we are experiencing changes in hormones, such as those that occur during pregnancy.
When our hormones change, micro-chemicals are released - and though we can't smell these small changes, our dogs definitely can. So, when your female hormones are changing, balancing out, or are completely out of whack, you're releasing small odors that your dog can certainly pick up on.
Recent studies say yes. They can smell stress, depression, sadness and grief. Dogs can smell the production of various hormones and brain chemicals. Dogs can smell the rise and fall of serotonin (a brain chemical associated with depression).
When you see a dog licking another dog's private parts, it is actually a healthy and normal dog social behavior – just a kind of polite getting-acquainted through grooming and scent of one another. They do this whether they are sterilized or not.
“Your dog is smart enough to pick up on these changes during pregnancy, both in a physical way — which is how your body will be changing, your stomach, your smell — and in an emotional way, such as your feelings and your mood,” she says.
The hormonal changes during pregnancy may cause subtle changes to the person's scent that are detectable only to their canine companion. It's likely that the dog senses some change in the owner's smell, but cannot identify such a specific reason as pregnancy.
There are several reasons your male dog is whining so much including; excitement, anticipation, apprehension or anxiety. This behaviour may increase if there is a nearby female dog in heat.
It is a sign of mental or emotional arousal. The behavior can be a physical outlet for the dog or a way of seeking attention. Some dogs may just mount the person, but other dogs may mount and escalate to biting when the person tries to push them off.
If you have an intact male dog, consider neutering him. Although neutering doesn't always stop a dog from mounting or masturbating, it does reduce his sexual motivation—especially if the behavior is triggered by the presence of a female dog who's in heat.
Your dog licks you to show they care, to get attention, to understand you better and because they enjoy it. However, the reason they may prefer your feet could be because they're bursting with scent information that tells them a lot about you, where you've been and what you've been doing.
Licking is a natural and instinctive behaviour to dogs. For them it's a way of grooming, bonding, and expressing themselves. Your dog may lick you to say they love you, to get your attention, to help soothe themselves if they're stressed, to show empathy or because you taste good to them!
Dogs, with their amazing noses, can pick up on these hormonal changes—even before a pregnancy test does. Researchers have found that when a female ovulates, change in hormone levels can attract dogs. For instance, researchers realized dogs tended to sniff private areas more around ovulation.
How far a dog smells depends on conditions such as wind and type of scent, but they have been reported to smell objects and people over 12 miles away. Dogs' olfactory systems work so well that they can be trained to pick up odors as little as a pictogram which is a trillionth of a gram.
It turns out that both cats and dogs are able to detect menstruation by odor and hormonal levels. Of course, they don't actually have any scientific concept of what's happening in your uterus, but they do know that something is going on.
There are several products that you can purchase to keep male dogs away from a female dog in heat. Chlorophyll, which is found in plants, masks the smell of heat, which will deter male dogs from searching for a female dog in heat. Chlorophyll can be found in health food stores or pet stores in liquid or tablet form.